Grinding, polishing, and buffing machine and the like



H. F. ALBRIGHT.

GRINDING, POLISHING, AND BUFFING MACHINE AND THE LIKE.

APPLICATLQN FILED OCT- 27 1916. 1,339,312. Patented May 4, 1920.

5 SHEET$SHEET I.

a o erifyf'teemood 1576219722" H. F. ALBRIGHT.

GRINDING. POLISHING. AND BUFFING MACHINE AND THE LIKE.

APPLICATION FILED OCT 27, mo.

1 ,38 9,3 l 2. ented May 4, 1920.

'5 SHbETS --SHEET 2.

H. F. ALBRIGHT.

GRINDING, POLISHING, AND BUFFING MACHINE AND THE LIKE.

APPLICATION FILED OCTIZI. I9! 6.

- Patented May 4, 1920.

5 SHEETS-SHEET 3.

i I I I I I r 5 I H. F. ALBRIGHT.

GRINDING, POLISHING, AND BUFFING MACHINE AND THE LIKE.

APPLICATION FILED OCT-27. 1916 1,339,312. Patented. May 4; 1920.

5 SHfETS-SHEET 4- H. F. ALBRIGHT.

GRINDING, POLISHING, AND BUFFING MACHINE AND THE LIKE.

APPLICATION FILED OCT. 27, I9I6.

1,339,312. Patented May 4,1920.

5 SHEETSSHEET 5.

UNITED STATES PATENT OFFICE.

HENRY FLEETWOOD ALBRIGHT, 01 OAK PARK, ILLINOIS, ASSIGNOB 'IO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented May 4, 1920.

Application filed October 27, 1916. Serial No. 128,039.

T oall whom it may concern:

Be it known that I, HENRY Fnnnrwoon ALBRIGHT, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinoig have invented certain new and useful Improvements in Grinding, Polishing, and Buffing Machines and the like, of which the following is a full, clear, concise, and exact description.

This invention relates to improvements in grinding, polishing, and bufiing machines, and the like.

One of the objects of the invention is to provide improved means whereby abrading Wheels-of various diameters may.be interchangeably'employed without exceeding a safe peripheral speed.

Another object is to provide means for manually adjusting the speed of the motor through a rheostat in conjunction with indicating means for indicating to the operator the desired speed for abrading wheels of any diameter.

In the accompanying drawings in which a practical embodiment of the invention is illustrated Figure 1 is a side elevation of the driving motor and controlling rheostat;

ig. 2 is a section on the line 22 of Fig. 1;

Fig. 3 is a central sectional elevation of the motor frame, certain parts being omitted for the sake of clearness;

Fig. 4 is a side elevation of a pair of polishing and bufling wheels and a housing therefor;

FFig. 5 is a section on the line 5-5 of ig. 6 is a top plan view of the polishing and bufiing ap aratus shown in Fig. 4, and

Fig. 7 is a ont elevation of a complete duplex polishing and buflin equipment.

The polishing and b g wheels are driven by a suitable motor 1 on the arma:

ture shaft 2 of which the abrading wheels 3, 4 may be directly mounted. Said wheels may be grinding, buflinig, or polishing wheels, or any other type of abrading wheels. Said wheels are mounted preferably in pairs, there being two sets on each end of said shaft, as shown in Fig. 7. Said wheels are removably mounted whereby they may be removed and other wheels substituted therefor.

Each pair of wheels is provided with a suitable housing supported on a base 5 and connected with an air duct 6 through an inclined outlet 7, whereby the dust may be drawn away from the abrading wheels.

The housing consists of a hood 8 which incloses the smaller of the two wheels 4 and is supported by suitable hinges 9 whereby it may be swung back to permit removal of said wheels. he larger wheel 3 is inclosed between the side plates 10, 11 supported on suitable hinges 12, 13, whereby they ma be swung aside to facilitate removal 0 said larger wheel. A hood 14 is arranged to cover the top of said larger wheel having side walls 15 which, with the top wall, form an inclosing channel. Said hood 14 is rotatably mounted on the support 16 which in the present instance is in the form of a ventilating pipe or tube, the

ventilating feature forming no part of the present invention. An arm or partition 17 is also mounted on the tube 16, being arranged to turn therewith. Said arm is provided with an abutment or stop 18 at its outer end arranged to contact with the periphery of the polishing wheel 3, in case said arm should be swung into contact therewith. The hood 14 is arranged to move with said arm 17 by means not shown here-- in, the extreme lower position of said hood being limited by the projection 21 thereon which engages the shoulder 22 on the main support.

The tube 16 has a gear sector 25 which is engaged by the worm 26' on a spindle 27. Said spindle carries at one end a controller arm 28 constituting part of a rheostat 29 for controlling the speed of the motor. The other end carries a suitable hand wheel 30 whereby the operator may adjust the rheostat. A plate 31 is mounted on the spindle 27 and is provided with peripheral graduations which, in conjunction with a pointer 32, indicate to. the operator the peripheral speed of polishing wheels of various diameters corresponding to a certain adjustment of the ,rheostat.

When the operator places the polishing wheel orwheels of a certain diameter on the driving shaft, he adjuststhe rheostat arm to a c rtain predetermined position by reference to an instruction sheet and thereafter starts the motor by means of a push button switch 33 or other switch which controls a motor starting device of any standard construction and not shown herein. The driving shaft thereby rotates at a speed which will assure a proper and safe peripheral speed of the abrading wheel.

The pivoted arm 17 and the Worm and gear connection therewith from the spindle 27 is to prevent the operator from making improper adjustment of the rheostat arm. If the operator attempts to adjust the rheostat arm to such a position as would result in improperly speeding up the motor for a polishing wheel of large diameter for example, the projection or' stop 18 will come in contact with the stationary periphery of said wheel prior to the starting of the motor, obstructing further rotation of the hand wheel 30 and thereby calling the operators attention to the fact that the limit of adjustment has been reached. The operator thereupon gives the hand wheel a partial turn in the reverse direction to move the abutment 18 out of contact with the periphery of the polishing wheel, so that when the motor starts there will be no unnecessary friction at this point.

()bviously this invention is capable ofmanyvariations and applications without departing from its spirit. and scope, as expressed in the appended claims.

What is claimed is:

1. In a device of the class described, a rotatable polishing wheel, a motor therefor, a rheostat for said motor, a spindle carrying the rheostat arm, a Worm on said spindle, a gear cooperating with the said worm, a shaft carrying said gear, and an arm on said shaft arranged to move in the plane of said polishing wheel.

2. In a device of the class described, an electric motor, a shaft extending from both sides thereof, a polishing wheel on each side of s id motor on said shaft, a supporting mem er parallel to said shaft, a pair of arms on'said member each arranged in the plane of one of said polishing wheels, a rheostat adjacent to said motor and comprising a movable arm, a shaft on which said arm is carried, a handle on said shaft, a worm also mounted on said shaft, and a gear mounted on said supporting member and cooperating with said worm.

3. In combination, an electric motor, a shaft extending from both sides thereof, polishing wheels on said shaft on each side of said motor, a supporting member parallel to said shaft, a plurality of arms on said member in the plane of their respective polishing wheels, a rheostat for said motor, means for manually adjusting said rheostat and simultaneously swinging said arms toward or away from said shaft whereby the radial positions of said arms with respect to said shaft and polishing wheels correspond to a definite peripheral speed of the latter, and an indicator associated with said means to enable the operator to make the proper initial adjustment for the desired peripheral s eed.

' 4. n a device of the class described, an electric motor, a polishing wheel on each side of said motor driven thereby, a supporting member parallel to the axis of rotation of said motor and polishing wheels, a pair of arms on said member each arranged in the plane of one of said polishing wheels, a rheostat above saidv motor, a rotatable spindle extending forwardly from said rheostat, a hand wheel on the forward end of said spindle, a dial adjacent to said hand wheel and mechanical connections between said spindle-and said supporting member whereby said rheostat and said arms may be adjusted simultaneously from said hand wheel to insure a peripheral speed of said wheels iin itccordance with the indications of said In witness whereof I hereunto subscribe my name this twenty-first day of October, A. D. 1916.

HENRY FLEE'IWOOD ALBRIGHT. 

